CN202713234U - Broadband adapting radio-frequency power amplification device - Google Patents
Broadband adapting radio-frequency power amplification device Download PDFInfo
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- CN202713234U CN202713234U CN 201220343922 CN201220343922U CN202713234U CN 202713234 U CN202713234 U CN 202713234U CN 201220343922 CN201220343922 CN 201220343922 CN 201220343922 U CN201220343922 U CN 201220343922U CN 202713234 U CN202713234 U CN 202713234U
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Abstract
The utility model relates to a broadband adapting radio-frequency power amplification device. The device comprises a main control circuit, a main amplification circuit and a feedback loop, wherein the main control circuit comprises a radio-frequency input unit, a first directional coupling unit, a delay unit, a second directional coupling unit, an amplifier unit and a radio-frequency output unit, the radio-frequency input unit, the first directional coupling unit, the delay unit, the second directional coupling unit, the amplifier unit and the radio-frequency output unit are connected sequentially, and the feedback loop comprises a predistortion module unit, the first directional coupling unit and the radio-frequency output unit. By the aid of sampling of radio-frequency signals and output signals and the predistortion processing of radio-frequency signals, the power of a radio-frequency power amplifier is improved effectively, the predistortion is provided and is used for pre-compensating the gain compression and the phase expansion of the radio-frequency power amplifier, and linear indexes of the radio-frequency power amplifier, such as the adjacent channel power ratio, can be improved.
Description
Technical field
The utility model relates to WCDMA frequency range radiofrequency signal amplifying technique in the communication system, energy Effective Raise efficiency of RF power amplifier, and can provide gain compression and the phase place expansion of predistortion with the precompensation radio-frequency power amplifier, improve the adjacent channel power of radio frequency amplifier than the linear index of (ACPR), particularly a kind of wideband adaptive radio frequency power amplifying device.
Background technology
Along with radio communication worldwide develop the radio spectrum resources growing tension rapidly.Utilize limited frequency spectrum resource for more effective, many wireless communication systems have all adopted the higher linear modulation mode of the availability of frequency spectrum.Because phase place and the amplitude of linearly modulated signal are all carried useful information, so all can cause the increase of the error rate and to the interference of adjacent wireless channel to any non-linear amplification of sort signal.These two kinds of ill effects all should do one's utmost to avoid when the design wireless communication system, so linearly modulated signal necessarily requires high linearity, Hi-Fi amplification.
The technology of comparative maturity has feedforward linearized technology, negative feedback linearization technique and digital baseband predistortion linear technology etc. at present.In these methods, the accessible index of feed-forward technique is better, but its cost is relatively high, and efficient is low, system complex, and the batch production difficulty is large.The digital baseband predistortion also can reach preferably index, but its technical difficulty is large, and cost is high.Therefore, be badly in need of a kind of linearization technique, the fidelity during with further raising power amplification is simplified circuit structure and reduces cost.
The utility model content
Main purpose of the present utility model is, for above-mentioned deficiency of the prior art, a kind of energy Effective Raise efficiency of RF power amplifier is provided, and can provide gain compression and the phase place expansion of predistortion with the precompensation radio-frequency power amplifier, with the wideband adaptive radio frequency power amplifying device of the adjacent channel power ratio that improves radio frequency amplifier.
For achieving the above object, the utility model by the following technical solutions.
The utility model provides a kind of wideband adaptive radio frequency power amplifying device, comprise governor circuit, main amplifying circuit and feedback loop, described main amplifying circuit comprises radio frequency input unit, the first directional couple unit, delay unit, the second directional couple unit, amplifier unit and the radio frequency output unit that connects successively, and described feedback loop comprises predistortion module group unit, described the first directional couple unit and radio frequency output unit; Described radiofrequency signal is after described radio frequency input unit input, be divided into main signal and sampled signal by described the first directional couple unit, after described main signal is amplified by described main amplifying circuit, through described radio frequency output unit output, after described sampled signal is processed by described predistortion module group unit, export in described the second directional couple unit, with described main signal stack coupling; The radiofrequency signal that described radio frequency output unit is exported described radio frequency output unit is taken a sample, and obtains error sample signal, and described error sample signal is fed back to described predistortion module group unit.
Than above-mentioned prior art, the utlity model has following beneficial effect.
Wideband adaptive radio frequency power amplifying device of the present utility model, adopt main amplifying circuit to carry out power amplification, feedback loop carries out the structural design of feedback calibration, make radiofrequency signal before being exaggerated, utilize the predistortion module group unit that radiofrequency signal is sampled, and this sampled signal carried out pre-distortion, then the coupling that superposes of the radiofrequency signal after will processing again and main signal carries out power amplification to the signal after the coupling.Simultaneously, take a sample to radiofrequency signal in the place at the radio frequency output unit, the error sample signal that obtains is fed back to the predistortion module group unit, the predistortion module group unit is according to the analysis result to error sample signal, will revise in real time during to the sampled signal pre-distortion, finally obtain needed radiofrequency signal output.Therefore, but the efficient of the utility model Effective Raise radio-frequency power amplifier has been simplified each circuit structure, has been reduced cost.
Description of drawings
Fig. 1 is the circuit theory schematic diagram of wideband adaptive radio frequency power amplifying device among the utility model embodiment.
Fig. 2 is the circuit block diagram of radio frequency input unit among the utility model embodiment.
Fig. 3 is the circuit block diagram of predistortion module group unit among the utility model embodiment.
Fig. 4 is the circuit block diagram of drive amplification unit among the utility model embodiment.
Fig. 5 is the circuit block diagram of final stage power amplifier unit among the utility model embodiment.
Fig. 6 is the circuit block diagram of radio frequency output unit among the utility model embodiment.
Fig. 7 is the pin configuration schematic diagram of microcontroller among the utility model embodiment.
Fig. 8 is the pin configuration schematic diagram of power supply processing unit among the utility model embodiment.
The realization of the utility model purpose, functional characteristics and advantage are done the step explanation into ' one in connection with embodiment with reference to accompanying drawing.
Embodiment
Describe the technical solution of the utility model in detail below with reference to drawings and the specific embodiments, so as clearer, understand invention essence of the present utility model intuitively.
Fig. 1 is the circuit theory schematic diagram of wideband adaptive radio frequency power amplifying device among the utility model embodiment.
With reference to shown in Figure 1, present embodiment provides a kind of wideband adaptive radio frequency power amplifying device 100, comprise governor circuit 1, main amplifying circuit 2 and feedback loop 3, main amplifying circuit 2 comprises radio frequency input unit 21, the first directional couple unit 22, delay unit 23, the second directional couple unit 24, amplifier unit 25 and the radio frequency output unit 26 that connects successively, and feedback loop 3 comprises predistortion module group unit 31, the first directional couple unit 22 and radio frequency output unit 26; Radiofrequency signal is after 21 inputs of radio frequency input unit, be divided into main signal and sampled signal by the first directional couple unit 22, after main signal is amplified by main amplifying circuit 2, through 26 outputs of radio frequency output unit, after sampled signal is processed by predistortion module group unit 31, export in the second directional couple unit 24, with main signal stack coupling.Radio frequency output unit 26 is taken a sample to its radiofrequency signal of exporting, obtains error sample signal, and error sample signal is fed back to predistortion module group unit 31.
Particularly, in the device of radiofrequency signal by radio frequency input unit 21 input present embodiments; Through the elementary amplification of radio frequency radio frequency input unit 21, after radiofrequency signal amplified by its inner filter circuit with the interference signal filtering after, further radiofrequency signal is amplified to again+2dBm～+ 6dBm.
Behind the first directional couple unit 24, radiofrequency signal is divided into two-way, and wherein one the tunnel is main signal, and another road is sampled signal.Main signal is successively through delay unit 23, the second directional couple unit 24, amplifier unit 25 and radio frequency output unit output 26; Sampled signal is as reference comparison and pumping signal, input in the predistortion module group unit 31, this sampled signal is processed, then export the second directional couple unit 24 to, main signal is coupled in the sampled signal stack that the predistortion module group unit is processed after 31, amplifies rear phase place and the amplitude distortion that is produced to improve by amplifier unit 25.
The second directional couple unit 24 is mainly used in sampled signal and main signal stack after being processed by predistortion module group unit 31.
Radio frequency output unit 26 has sample of signal and output signal buffer action, wherein sample of signal refers to the radiofrequency signal that radio frequency output unit 26 is exported is taken a sample, obtain error sample signal, and this error sample signal is input in the above-mentioned predistortion module group unit 31, the output signal isolation refers to export final amplifying signal.Particularly, radio frequency output is divided into again power output detection and error signal sampling two parts, power output detects and is mainly used in converting radiofrequency signal to aanalogvoltage, this aanalogvoltage is sampled to governor circuit 1 power, operating voltage to the amplifier in each circuit is controlled, and makes it keep stable operating voltage.
Predistortion module group unit 31 mainly is that sampled signal and error sample signal are analyzed processing, and sampled signal processed accordingly, then the sampled signal after will processing is by the second directional couple unit 24 and main signal stack coupling, to reach the predistortion effect.
Governor circuit 1 mainly is the grid step voltage that comes control amplifier unit 25 by parameters such as the temperature of detecting amplifier unit 25, input, output and reverse amplitudes, to regulate the gain of control amplifier unit 25, make whole circuit can guarantee that gain in the total temperature scope, linearity and efficient reach target call.Governor circuit 1 can also the DC direct voltage that be provided by the outside be provided to the needed operating voltages of circuit at different levels such as governor circuit 1, main amplifying circuit 2 and feedback loop 3.
The wideband adaptive radio frequency power amplifying device 100 of present embodiment can not only automatically adjust according to the parameter of the radiofrequency signal of exporting to amplifier unit 25, can also come according to ambient temperature the bias level of control amplifier unit 25, to change the gain of amplifier unit 25, thereby realize the adaptation function in the various environment, output is high linear.The radiofrequency signal of Hi-Fi amplification.
Fig. 2 is the circuit block diagram of radio frequency input unit among the utility model embodiment.
With reference to shown in Figure 2, the wideband adaptive radio frequency power amplifying device of present embodiment is based on embodiment illustrated in fig. 1, and the circuit structure of radio frequency input unit 21 is optimized.
Particularly, radio frequency input unit 21 comprises analog gain control circuit (HSMP-3816-TR1G) 211, digital gain control and amplifying circuit (HMC742LP5) 212, filter circuit 213 and power gain amplifying circuit (HMC789ST89) 214.After the radiofrequency signal input, behind analog gain control circuit 211 preliminary amplifications, be input in digital gain control and the amplifying circuit 212, filter circuit 213 adopts SAW (Surface Acoustic Wave) filter F2G12, radiofrequency signal is carried out filtering, power gain amplifying circuit 214 further amplifies radiofrequency signal again, radiofrequency signal is amplified to+2dBm～+ 6dBm, to satisfy the demanded power output of device.
Fig. 3 is the circuit block diagram of predistortion module group unit among the utility model embodiment.
With reference to shown in Figure 3, the predistortion module group unit 31 of present embodiment comprises input impedance conversion device 311, analog predistortion chip 312, output impedance converter 313 and feedback impedance converter 314; Between input impedance conversion device 311 and analog predistortion chip 312, be provided with input impedance matching network 315, between output impedance converter 313 and analog predistortion chip 312, be provided with output impedance matching networks 316; Between feedback impedance converter 314 and analog predistortion chip 312, be provided with feedback impedance matching network 317.
Fig. 4 is the circuit block diagram of drive amplification unit among the utility model embodiment; Fig. 5 is the circuit block diagram of final stage power amplifier unit among the utility model embodiment.
In conjunction with Fig. 1, Fig. 4 and shown in Figure 5, the amplifier unit 25 of present embodiment comprises drive amplification unit 251 and final stage power amplifier unit 252, wherein, the drive amplification unit is connected with the second directional couple unit 24, the output of final stage power amplifier unit 252 is connected with drive amplification unit 251, and output is connected with radio frequency output unit 26.
Drive amplification unit 251 comprises the first power amplifier 2511, the second power amplifier 2512 and inter-stage isolator 2513, the model of this first power amplifier 2511 is F218E, the second power amplifier 2512 is the LDMOS power amplifier, and inter-stage isolator 2513 adopts IL07BL2140AAE2 type interstage matched paster isolator.Between the first power amplifier 2511 and the second power amplifier 2512, also be provided with the first input matching network 2514, be used for the coupling between realization radiofrequency signal output impedance and 2512 input impedance of the second power amplifier, make the second power amplifier 2512 obtain maximum exciting power; Between the second power amplifier 2512 and inter-stage isolator 2513, be connected with the first output matching network 2515, external load (herein for final stage power amplifier unit 252) is transformed to the required optimum load resistance of the second power amplifier 2512, maximum to guarantee its power output.
Final stage power amplifier unit 252 comprises the 3rd power amplifier 2521, be provided with the second input matching network 2522 between above-mentioned drive amplification unit 251 and the 3rd power amplifier 2521, between the 3rd power amplifier 2521 and above-mentioned radio frequency output unit 26, also be provided with the second output matching network 2523, this second input matching network 2523 is identical with the effect of the first input matching network 2514, the second output matching network 2522 is also identical with the first output matching network 2515, repeats no more herein.
Fig. 6 is the circuit block diagram of radio frequency output unit among the utility model embodiment.
With reference to shown in Figure 6, the radio frequency output unit 26 of present embodiment comprises sampling coupler 261 and output isolator 262, and sampling coupler 261 is used for the radiofrequency signal of output is taken a sample, and obtains error sample signal; Output isolator 262 is used for exporting final amplifying signal.The power output that has sampling coupler 261 detects and error signal sampling two parts function, power output detects and is mainly used in converting radiofrequency signal to aanalogvoltage, this aanalogvoltage is sampled to governor circuit 1 power, operating voltage to the amplifier in each circuit is controlled, and makes it keep stable operating voltage.
Particularly, output isolator 262 adopts the 116-211-217-BV048 type, sampling coupler 261 adopts the XC2100A-30S type, and sampling coupler 261 is connected with one 1/2 power dividers 263, and the output of this 1/2 power divider 263 is connected with respectively HMC909LP4 type power output wave detector 264 and feedback oscillator control circuit 265; Feedback oscillator control circuit 265 is connected with predistortion module group unit 31, and power output wave detector 264 is connected with a differential comparison circuit 266 again, and differential comparison circuit 266 is connected with radio frequency input unit 26.
Fig. 7 is the pin configuration schematic diagram of microcontroller among the utility model embodiment; Fig. 8 is the pin configuration schematic diagram of power supply processing unit among the utility model embodiment.
In conjunction with Fig. 1, Fig. 7 and shown in Figure 8, the governor circuit 1 of present embodiment comprises monitoring unit 11 and power supply processing unit 12, this monitoring unit 11 comprises a microcontroller, this microcontroller is controlled main amplifying circuit 2 and feedback loop 3, and this power supply processing unit 12 provides required separately direct voltage for above-mentioned main amplifying circuit 2, feedback loop 3 and monitoring unit 11.
Simultaneously, microcontroller has the temperature sense module, and its pin by relative set (such as Tem Det) output control signal with the bias voltage of control drive amplification unit 251 and final stage power amplifier unit 252, thereby is controlled its gain.
In addition, microcontroller also comprises the automatic electric-level control module, and dispose corresponding pin (such as Bias1Ctrl, Bias2 Ctrl and ALC Ctrl, etc.), by this pin output control signal, make the operating voltage of above-mentioned radio frequency input unit 21 and amplifier unit 25 keep stable, can not change because of environmental change or load variations.
In sum, wideband adaptive radio frequency power amplifying device of the present utility model, adopt main amplifying circuit to carry out power amplification, feedback loop carries out the structural design of feedback calibration, make radiofrequency signal before being exaggerated, utilize the predistortion module group unit that radiofrequency signal is sampled, and this sampled signal is carried out pre-distortion, then the coupling that superposes of radiofrequency signal after will processing again and main signal carries out power amplification to the signal after the coupling.Simultaneously, take a sample to radiofrequency signal in the place at the radio frequency output unit, the error sample signal that obtains is fed back to the predistortion module group unit, the predistortion module group unit is according to the analysis result to error sample signal, will revise in real time during to the sampled signal pre-distortion, finally obtain needed radiofrequency signal output.Therefore, but the efficient of the utility model Effective Raise radio-frequency power amplifier has been simplified each circuit structure, has been reduced cost.
The above only is preferred embodiment of the present utility model; be not so limit its claim; every equivalent structure transformation that utilizes the utility model specification and accompanying drawing content to do; directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (10)
1. wideband adaptive radio frequency power amplifying device, comprise governor circuit, main amplifying circuit and feedback loop, it is characterized in that: described main amplifying circuit comprises radio frequency input unit, the first directional couple unit, delay unit, the second directional couple unit, amplifier unit and the radio frequency output unit that connects successively, and described feedback loop comprises predistortion module group unit, described the first directional couple unit and radio frequency output unit; Described radiofrequency signal is after described radio frequency input unit input, be divided into main signal and sampled signal by described the first directional couple unit, after described main signal is amplified by described main amplifying circuit, through described radio frequency output unit output, after described sampled signal is processed by described predistortion module group unit, export in described the second directional couple unit, with described main signal stack coupling; The radiofrequency signal that described radio frequency output unit is exported described radio frequency output unit is taken a sample, and obtains error sample signal, and described error sample signal is fed back to described predistortion module group unit.
2. wideband adaptive radio frequency power amplifying device as claimed in claim 1, it is characterized in that: described radio frequency input unit comprises analog gain control circuit, digital gain control and amplifying circuit, filter circuit and power gain amplifying circuit.
3. wideband adaptive radio frequency power amplifying device as claimed in claim 1, it is characterized in that: described predistortion module group unit comprises input impedance conversion device, analog predistortion chip, output impedance converter and feedback impedance converter; Between described input impedance conversion device and analog predistortion chip, be provided with the input impedance matching network, between described output impedance converter and analog predistortion chip, be provided with output impedance matching networks; Between described feedback impedance converter and analog predistortion chip, be provided with the feedback impedance matching network.
4. wideband adaptive radio frequency power amplifying device as claimed in claim 1, it is characterized in that: described amplifier unit comprises drive amplification unit and final stage power amplifier unit, described drive amplification unit is connected with described the second directional couple unit, the input of described final stage power amplifier unit is connected with described drive amplification unit, and output is connected with described radio frequency output unit.
5. wideband adaptive radio frequency power amplifying device as claimed in claim 4, it is characterized in that: described drive amplification unit comprises the first power amplifier, the second power amplifier and inter-stage isolator, between described the first power amplifier and the second power amplifier, be provided with the first input matching network, between described the second amplifier and inter-stage isolator, be connected with the first output matching network.
6. wideband adaptive radio frequency power amplifying device as claimed in claim 4, it is characterized in that: described final stage power amplifier unit comprises the 3rd power amplifier, be provided with the second input matching network between described drive amplification unit and described the 3rd power amplifier, be provided with the second output matching network between described the 3rd power amplifier and the described radio frequency output unit.
7. wideband adaptive radio frequency power amplifying device as claimed in claim 1, it is characterized in that: described radio frequency output unit comprises sampling coupler and output isolator, described sampling coupler is connected with a power divider, and described power divider is connected with respectively power output wave detector and feedback oscillator control circuit; Described feedback oscillator control circuit is connected with described predistortion module group unit, and described power output wave detector is connected with a differential comparison circuit again, and described differential comparison circuit is connected with described radio frequency input unit.
8. wideband adaptive radio frequency power amplifying device as claimed in claim 1, it is characterized in that: described governor circuit comprises monitoring unit and power supply processing unit, described monitoring unit comprises a microcontroller, and described microcontroller is controlled described main amplifying circuit and feedback loop; Described power supply processing unit provides required direct voltage for described main amplifying circuit, feedback loop and monitoring unit.
9. wideband adaptive radio frequency power amplifying device as claimed in claim 8, it is characterized in that: described microcontroller has the temperature sense module, and by corresponding pin output control signal, control the bias voltage of described drive amplification unit and final stage power amplifier unit.
10. wideband adaptive radio frequency power amplifying device as claimed in claim 8, it is characterized in that: described microcontroller comprises the automatic electric-level control module, and by corresponding pin output control signal, make the operating voltage of described radio frequency input unit and amplifier unit keep stable.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220343922 CN202713234U (en) | 2012-07-16 | 2012-07-16 | Broadband adapting radio-frequency power amplification device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220343922 CN202713234U (en) | 2012-07-16 | 2012-07-16 | Broadband adapting radio-frequency power amplification device |
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| CN202713234U true CN202713234U (en) | 2013-01-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109408974A (en) * | 2018-10-30 | 2019-03-01 | 中国电子科技集团公司第十三研究所 | Power device preparation method |
| CN110417366A (en) * | 2019-08-20 | 2019-11-05 | 上海联影医疗科技有限公司 | Radio-frequency power amplifier control device and radio-frequency power amplifier |
| CN115037390A (en) * | 2022-08-10 | 2022-09-09 | 成都工业学院 | Three-port transceiver chip parameter extraction method |
-
2012
- 2012-07-16 CN CN 201220343922 patent/CN202713234U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109408974A (en) * | 2018-10-30 | 2019-03-01 | 中国电子科技集团公司第十三研究所 | Power device preparation method |
| CN110417366A (en) * | 2019-08-20 | 2019-11-05 | 上海联影医疗科技有限公司 | Radio-frequency power amplifier control device and radio-frequency power amplifier |
| CN115037390A (en) * | 2022-08-10 | 2022-09-09 | 成都工业学院 | Three-port transceiver chip parameter extraction method |
| CN115037390B (en) * | 2022-08-10 | 2022-10-28 | 成都工业学院 | Three-port transceiver chip parameter extraction method |
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Effective date of registration: 20160811 Address after: 453000, No. 1, Xinchang north line, Xinxiang, Henan Patentee after: Henan Zhongrong Hangdian Technology Co. Ltd. Address before: 518000, Guangdong, Nanshan District, Taoyuan Shenzhen street, 1213 cents Xian Road, the crown Honghua District, 2 South District, 2, 3 floor Patentee before: Syrinx Communications Equipment Co., Ltd. of Shenzhen City |
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Granted publication date: 20130130 Termination date: 20170716 |